Physics 271: Advanced Honors Physics I
Recitation #7
Fall 2017
61. Here you have two
equations -- conservation of momentum and conservation of kinetic
energy, and we have two unknowns that appear multiplied together.
It's a bit more involved than for the previous problem to organize
the solution and several different ways will work. One is to solve
the momentum equation first for m2 in terms of v2f and subsitute for
m2 in the kinetic energy equation. Simplify using a2-b2
= (a+b)(a-b).
(a) 99 g (b) 1.9 m/s (c) 0.93 m/s
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